Hi Wayne
I don't know of anyone currently manufacturing a "quickfill" type of fuel tank.
Unless you have a specific tank design in mind, I'd just the buy the correct size brodak tank, 1 or 2 oz. and re-plumb for racing, then install a mechanical quickfill. Melvin Shuette sells a very nice mechanial quickfill, as does the racing moderator of this forum Scott Jenkins.
Mark Warwashana can supply the Rubber "Duck Bill" type quickfill that "Dons" and "Taffinder" had supplied in the past. He also has the old "Dons" wheel line as well, and can supply them in the original hard black rubber, as well as red Polyeurethane, in sizes from 1.25-2.25" in 1/4" increments.
Les